Improvement in boring-machines



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CHARLES BALDWIN, 0F WILLINGTON, CONNECTICUT.

Letters Patent No. 108,552, dated October 25, 1870.

IMPROVEMENT IN BORING-MACHINES.

The Schedule referred to in these Letters Patent and making pari'. ofthe ame.

I, CHARLES N. BALDWIN, of Wllington, ih the county of Tolland and State of Connecticut, have invented certain improvements in Machines for Boring Post-holes, of which the following isa specification.

Nature and Objects of thc Invention.

Description of the Accompanying Drawing.

Figure 1 is a side' elevation.

Figure 2 is a plan view.

Figure 3 is a detached view of the pawl-:uitl-ratchet device. l

Like letters indicate like parts.

General Description.

The letters d d designate two of the four wooden uprights which support the top pieces bb, upon which is the swiftly-revolving auger c.

About half way up the nprights b If are the crosspieccs d d, upon which are laid the tracks or ways c c.

Upon these tracks runs the lower platform f j', pulleys inits under side running on the tracks.

0n the top of this lower platform are laid the traclfs or ways g g, upon which runs, by means of pulleys, the upper platform It, which tends to run in the direction of the pulley i, being drawn by the weightj, and the attaching-cord.

To the top of the upper platform is tixed a grasping device, for holding the posts. I t consistsof two sets of jams le It, 7e k', operated bya ratchet and lever.

The post to be bored is grasped by these jams, the

op of the post just coming through the jams le', and

no more.

The movement of this upper platform is regulated by the pawl-and-ratchet device shownin-fig. 3. The

post being fixed in the jams, as just described, the

auger will be ready for the top one of the two auger-- holes necessary for each post-hole.

To borea hole, the lower platform is pushed forward till the auger runs through the post. It is then drawn back, and a step upon the treadle l moves the uppel` platform along justfar enough to bore, the second auger-hole ofthe first post-hole. The next step on the treadle carries the post along into position for boring the first auger-hole for the second post-hole, and so on.

Aixed to the bottom of the upper platform is the rack m, into which gears the cog-wheel 1t, fixed on the shaft o.

On the same shaft is fixed a small solid cylinder, p, having ratchet-catches (in this case four sets for four post-holes) upon it at equidistantintervals, two catches upon each interval, rr1 fr2 r3 fr.

On this same shaft, between the cog-wheel u and the solid cylinder p, is a. loose arm, s, one end of which is attached to the treadle by means of the rod t.

To the other end of the loose arm is affixed the pawl a, kept down upon the cylinder p by the weight v. As the arm sis vibrated by the foot upon the treadle, the pawl moves back and catchesV into another notch in'. the cylinder, and moves it around, moving the cog-wheel, and, ot' course, the upper platform.

The stationary pawl s holds the cylinder p from turning back again ,when once turned by the loose pawl.

The intervals between the catches 1, 83o., as well as their number, will be regulated by the number' of post-holes it is desired to make in a post.

There is an arm, 9:, attached to the stationary pawl z, with a hand-crankat the end, by raising which, when the post-holes for a single post have all been bored, both of the pawls will be raised o the cy1inder, and the upper platform allowed to run back into position for another post.

The stationary pawl raises the loose pawl, when itselfl raised, by means of a little pin, projecting from the side of the loose pawl, against which the back of the stationary pawl strikes.

All the part-s not specifically claimed herein are old.

C' lai'ms.

1. The ratchet-and-pawl device described, consisting of the shaft o, notched cylinder p, loose arm s, pawls 'zt-w, weight t', and treadle l, when the parts are ar' rangedv as described, for the purpose set forth.

y2. The combination of the device above claimed, with the gearwheel n, and rack-bar m, as described.

CHARLES N. BALDWIN.

Witnesses:

SOLYMAN TAYLOR, EDWARD F. Keur. 

